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Portlandite, a new mineral from Scawt Hill, Co. Antrim

Published online by Cambridge University Press:  14 March 2018

C. E. Tilleu
C. E. Tilleu*
Affiliation:
University of Cambridge
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Extract

Though calcium hydroxide has long been known as a product of hydrolysis of Portland cement, reliable data on its physical and optical properties were not available until Ashton and Wilson prepared this substance artificially and had examined crystals developed in rugs in old cement briquettes. In examining some recently collected larnite-spurrite-rocks from Scawt Hill the writer observed crystals now shown to be Ca(OH)2 as constituents of aggregates composed mainly of coarsely grained afwillite, forming infillings in these contact-rocks.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 23 , Issue 142 , September 1933 , pp. 419 - 420
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1933

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References

page 419 note 1 Ashton, F. W. and Wilson, R., Amer. Journ. Sci., 1927, ser. 5, vol. 13, p. 209.Google Scholar [Min. Abstr., voL 5, p. 257.]

page 419 note 2 Tilley, C. E., Geol. Mag., 1930, vol. 67, p. 168.CrossRefGoogle Scholar [M.A. 4-330.]

page 419 note 3 Clove oil consists largely of eugenol, the acidic properties of which are responsible for its action on the base Ca(OH)2.